This movie shows the discovery of the Champagne vent at northwest Eifuku volcano during the Submarine Ring of Fire 2004 expedition. You can see bubbles of liquid carbon dioxide are actively venting from sea-floor hot springs; this unusual phenomenon is due to the fact that the emissions from NW Eifuku volcano are particularly gas-rich. The high pressure at this depth keeps the carbon dioxide in a liquid state. Scientists discovered the Champagne vent at a depth of 1,607 meters (5,272 feet -- nearly 1 mile deep).